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    Wyświetlanie 1-3 z 3
    Tytuł:
    Radio network planning of GSM-R in polish railways standards
    Autorzy:
    Siergiejczyk, M.
    Włodarczyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/393926.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Stowarzyszenie Telematyki Transportu
    Tematy:
    system
    GSM-R
    planning
    dimensioning
    planowanie
    wymiarowanie
    Opis:
    The article presents some problems for the radio network planning rail system digital mobile GSM-R. There is a description of the architecture of the system, a set of available services and the different ways of data transmission. Then there are presented certain conditions that should be taken into account for the link and the requirements for network dimensioning for the purpose of determining the physical capacity of the network. Volume generated within the base station telecom traffic affects not only the number needed to handle the movement of resources, but also implies a number needed to allocate frequency channels.
    Źródło:
    Archives of Transport System Telematics; 2014, 7, 3; 42-46
    1899-8208
    Pojawia się w:
    Archives of Transport System Telematics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of the possibility of using transmission in the lte system on a selected railway line for the purpose of running railway traffic
    Autorzy:
    Chrzan, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/1833612.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    GSM-R
    LTE system
    open systems
    railway line
    railway traffic control
    system LTE
    linia kolejowa
    kontrola ruchu kolejowego
    Opis:
    The railway and the Rail Traffic Control Systems installed on it in Poland have recently experienced rapid technological development. This is undoubtedly due to the funds that Poland receives from the European Union for the modernization of railway infrastructure. The development of modern railway infrastructure means not only stations, modern rolling stock, but also safe and reliable train control systems based on the latest telecommunications and information technologies. For a longer time, radio communication based on the GSM-R (GSM for Railways) standard is being introduced on PKP. For this purpose, dedicated infrastructure is being built in order to use this technology for railway traffic. This is associated with huge investment costs. Since the beginning of its existence, research has been conducted worldwide on the use of LTE (Long Term Evolution) technology for conducting railway traffic. For economic and technological reasons, it is necessary to study other possibilities of using modern telecommunications infrastructure not yet dedicated to railway tasks in these open networks. The article will present research on the use of open radio communication network based on LTE standard for rail traffic and passenger comfort. It will discuss the research method and selected results of measurements made on railway line no. 4. The choice of this railway line was dictated by two factors. The first one resulted from the maximum train speed, the second one is the variety of rolling stock used on this line (compartmental and non-compartmental wagons). The part of research concerning collection of measurement material was performed within the framework of completed research work PBS3/A6/29/2015. As a result of conducted in-depth literature analysis as well as performed measurements and calculations, it allowed to develop a model and software for simulating system operation in real conditions. This system allows to send railway telegrams on appropriate safety level defined in standardization documents. The research proved the possibility of using an open system in the LTE standard for the transmission of signals for railway traffic control and passengers while maintaining an appropriate level of safety. The only limitations which were indicated by the tests are improper radio interface coverage of railway lines. Appropriate planning of radio coverage of railway areas by radio communication operators (so far ignored) with proper cooperation of infrastructure manager can lead to launching efficient communication system without necessity to build specialized infrastructure for railway.
    Źródło:
    Archives of Transport; 2021, 57, 1; 91-101
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Key Management System in ETCS
    Autorzy:
    Franekova, M.
    Chrtiansky, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/393513.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Stowarzyszenie Telematyki Transportu
    Tematy:
    radiokomunikacja ruchoma
    otwarty system transmisji
    GSM-R
    KMS
    zarządzanie
    mobile communications
    open transmission system
    key management system
    radio block centre
    key management centre
    on board unit
    brute force attack
    birthday paradox
    Opis:
    Paper deals with problems of KMS (Key Management System), which is developed in mobile communications GSM-R (Global System Mobile for Railway) recommended within the European Train Control System (ETCS), through the Euroradio system. Th e main part is oriented to safety procedures description of off-line KMS system between communication entities of ETCS system. In the experimental part the results of computational safety of modifi ed DES algorithm are summarised using special brute force attack to key – birthday paradox.
    Źródło:
    Archives of Transport System Telematics; 2009, 2, 1; 12-16
    1899-8208
    Pojawia się w:
    Archives of Transport System Telematics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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